PFD overpressure protection SIF on production header

MAR Consulting supported performing and documenting a Probability of Failure on Demand (PFD) calculation. Due to the addition of new wells to the offshore producing platform in the Norwegian Continental Shelf (NCS), an hazard analysis identified a potential overpressure scenario. The production header has mechanical protection (relief valves) and a Safety Instrumented Function as a redundant barrier. Hence, MAR Consulting calculated the average PFD for this low demand Safety Instrumented Function (SIF). The PFD, when compared to the required risk reduction for this scenario, is acceptable for a number of new wells.

Mini-FSA stage 3 equipment for an SPS

MAR Consulting performed a functional safety assessment (FSA) stage 3 for an engineering contractor and equipment supplier to a subsea production system (SPS). The SPS will be installed and operated in the Norwegian Continental Shelf (NCS). The equipment designed by the engineering company constituted the boundary for the FSA. The equipment is similar to the SPS currently in production in the tie-in field. Hence, the FSA focused mainly on installation, commissioning, and validation activities. MAR Consulting acted as an independent assessor to the project. The objectives were to ensure the equipment is fit for the safety instrumented functions; and is […]

Implementation barrier management tool for oil and gas operator in Norway

MAR Consulting will support the technical implementation of a barrier management system into a built-for-purpose tool. The contract is with a major operator in the Norwegian Continental Shelf (NCS). The main purpose of the cloud software tool is to document and provide an overview of the status of all barriers and respective performance standards at any time. In other words, the interactive tool provided constantly updated visualizations of barrier status. This is a step forward from the traditional static barrier management systems and documentation. Depending on the success of the initial pilot, the same tool will be deployed for the […]

Cyber-security risk assessment of offshore assets

MAR Consulting facilitated a cyber-security risk assessment for an operator of offshore assets in the Norwegian Continental Shelf (NCS). The assets shall comply with the strict Norwegian regulatory requirements. Petroleum Safety Authority (PSA) in Norway runs periodical audits to ascertain the level of IT security (among others) in the operating assets in the NCS. This work is part of an extended partnership with the operator to identify potential cyber-security vulnerabilities in their portfolio. Other assessments part of this work are: Cyber-security assessment of FPSO IT/OT systems · MAR Consulting; Cyber-security risk assessment of FPSO · MAR Consulting; Cybersecurity hazard identification […]

FMECA / FMEDA subsea drilling BOP (electrical and hydraulic systems)

MAR Consulting facilitated and documented a Failure Modes, Effect, Criticality and Diagnostics Analysis (FMECA / FMEDA) of the electrical and hydraulic control and safety systems of a major drilling contractor’s subsea drilling BOP. This work is part of an extended partnership to deliver such a product to the entire fleet of drilling rigs and ships. Description of projects MAR Consulting has been involved as part of this partnership: FMEA of electrical and control systems in subsea BOP · MAR Consulting; FMECA of redundant subsea BOP deadman-autoshear · MAR Consulting; FMECA electrical and control systems in subsea BOP · MAR Consulting; […]

Safety Analysis Report (SAR) of topside drilling BOP

MAR Consulting expertise was used to perform a safety analysis report (SAR) and SIL compliance verification of the safety instrumented functions on the topside drilling BOP stack. As part of this effort, a FMECA was performed for the BOP (FMECA of topside BOP and control system · MAR Consulting). NORSOK D-001 “Drilling facilities” and NORSOK D-010 “Well integrity in drilling and well operations” describe the well barriers used during drilling. Drilling BOPs require strategies and principles for design, operation, and maintenance since they are defined as part of a barrier. The objective is that the barrier will function as required […]

Functional safety study of inlet overpressure protection system (IOPS)

MAR Consulting assisted in performing a functional safety study of the inlet overpressure protection system (IOPS) for a platform operating offshore in the Norwegian Continental Shelf (NCS). The operator requires an additional barrier due to modifications. The scope of work includes the proposed concept redesign of the IOPS to accommodate potential overpressure hazards as a result of topside modifications in the platform. The focus was on functional safety aspects from a holistic perspective, as opposed to process safety aspects. Systematic integrity and software compliance were out of scope for this assignment. The objectives of the IOPS functional safety study were […]

FMECA of topside BOP and control system

Introduction MAR Consulting facilitated and documented a Failure Modes, Effects and Criticality Analysis (FMECA) for a major operator, of a hydraulic and pneumatic control system in a topside drilling Blow-Out Preventer (BOP). The FMECA was part of the initiative to re-start drilling in a field in the Norwegian Continental Shelf (NCS). The BOP OEM updated the BOP with a shear boost upgrade, PLC upgrade, auxiliary readback pressure panels, and Managed Pressure Drilling (MPD) flowline function addition. Objective In addition to the failure analysis, the Safety Analysis Report (SAR) used the FMECA outcome to comply with functional safety rules and regulations […]

FMECA of an unmanned system for subsea inspections and seabed surveys

Introduction and objectives of the FMECA of an unmanned system for subsea inspections MAR Consulting performed a Failure Modes, Effects and Criticality Analysis (FMECA) of an unmanned system for subsea inspections and seabed surveys, as part of the technology qualification process. The main objectives of the FMECA were to: Identify failure modes of the different sub-systems/components in the system with a technology readiness level (TRL) lower than 5; Evaluate the criticality of each failure on the system; Provide the basis for planning of the technology qualification activities; Provide input for the testing program; Provide input for the selection of components […]

FSA stage 2 of SPS (subsea production system)

MAR Consulting performed a functional safety assessment (FSA) stage 2 for the operator of a subsea production system (SPS). The SPS will be installed and operated in the Norwegian Continental Shelf (NCS). The FSA also included the SIS lifecycle phases typically assessed in an FSA stage 1. The scope was the subsea development design and boundaries towards the topside on the host platform. The scope of the assessment excluded topside tie-in modifications. MAR Consulting acted as an independent assessor to ensure the design of the SIS meets the required risk reduction and is in compliance with the standards, Norwegian rules, […]